LAS VEGAS, NV - APRIL 08: Musician Brantley Gilbert performs onstage during Tim McGraw's Superstar Summer Night presented by the Academy of Country Music at the MGM Grand Garden Arena on April 8, ... more

LAS VEGAS, NV - APRIL 08: Musician Brantley Gilbert performs onstage during Tim McGraw's Superstar Summer Night presented by the Academy of Country Music at the MGM Grand Garden Arena on April 8, 2013 in Las Vegas, Nevada. (Photo by Ethan Miller/Getty Images) less